in lib/aws-record/record/table_config.rb [281:291]
def exact_match?
resp = @client.describe_table(table_name: @model_class.table_name)
_throughput_equal(resp) &&
_keys_equal(resp) &&
_ad_equal(resp) &&
_gsi_equal(resp) &&
_ttl_match_check
rescue DynamoDB::Errors::ResourceNotFoundException
false
end